The difference between Compost and Mulch
When used as nouns, compost means the decayed remains of organic matter that has rotted into a natural fertilizer, whereas mulch means any material used to cover the top layer of soil to protect, insulate, or decorate it, or to discourage weeds or retain moisture.
When used as verbs, compost means to produce compost, let organic matter decay into fertilizer, whereas mulch means to apply mulch.
check bellow for the other definitions of Compost and Mulch
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Compost as a noun:
The decayed remains of organic matter that has rotted into a natural fertilizer.
Examples:
"Dig plenty of compost into clay or sandy soil to improve its structure."
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Compost as a noun (obsolete):
A mixture; a compound.
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Compost as a verb:
To produce compost, let organic matter decay into fertilizer.
Examples:
"If you compost your grass clippings, you can improve your soil."
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Mulch as a noun (agriculture, horticulture):
Any material used to cover the top layer of soil to protect, insulate, or decorate it, or to discourage weeds or retain moisture.
Examples:
"An organic mulch is a mulch made of natural substances such as leaves or grass clippings."
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Mulch as a noun (countable, agriculture):
A material used as mulch, as a decorative redwood bark mulch.
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Mulch as a verb (agriculture):
To apply mulch.
Examples:
"Mulch your vegetable garden to retain moisture and keep weeds down."
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Mulch as a verb (agriculture):
To turn into mulch.
Examples:
"I decided to mulch the grass clippings."